Air box for stokers



Feb. 15,1927. 1,617,479

n. A. FoREsMAN un ox Fon s'roxans Filed Jan. 5, 1923 2 Sheets-Sheet 1 l ATTORNEY l 617,479 Feb l5 1927' n. A. FoREsMAN AIR BOX FOR STOKERS 'Filed Jan. 3, 1923 2 Sheets-Sheet 2 WITNESSES:

Patented Feb. Al5, 1927.

UNITED STATES PATENT OFFICE.

ROBERT-A. FOBESIAN, I MOORE, PENNSYLVANIA, ABSIGNOB T0 WEBTINGHOUSE ELECTRIC AND IANUIAGTURING COMPANY, A CORPORATION 0l' PENNSYLVANIA.

'am nox ron s'roxxas.

Application led January 3, 1923. Serial llo. 010,505.

' This invention relates to stoker furnaces and more particularly to furnaces of the multiple retort underfeed type and 1t has for an object to provide in an apparatus of the character des' ated a front wall construction which incorporate therein permanent wall-sustaining structure supported upon the forward ends of the tuyere air boxes and removable front wall air-distnibuting boxes resting upon and receiving air from the tuyre boxes. It has for a further object to secure a more uniform distribution of fuel enteriilthe furnaceby p roviding in the front w structure diver mg or expandin openings from the fuel opper into the interior of the furnace.

These and other objects of my invention which are more manifest in the further description of my invention may be attained 2 by the employment of the apparatus illustrated in the accompanying drawing in which, Fig. 1 is a fr entary perspective view of a Stoker em ying m invention; Fig. 2 is a view in elevation of e front wall u air-distribut' box and wall-Sustalning structure, looking from the interior of the furnace, certain parts being broken away;

Fig. 3 is a view 1n Section of the walIsustaming and air-distributing box structure taken on a vertical lane including the center line of a tuyre ank; Fig. 4 is a view m side elevation of a wall-sustainn section; and Fig. 5 is a view in front elevation of the Section shown in Fig. 4.

* Referring to the rawings for a detailed description of my invention I show an underfeed Stoker of 'the multiple retort type having spaced tuyre air boxes 10 upon e side walls 11 of which are disposed series of tuyere plates 12. Retorts 14 are formed between the side walls 11 of the tuyre alr boxes, the bottoms of the retorts 4being formed of lates 15 supported on lugs 16 on the side walls 11. The side walls 11 are suit-- ably supported upon the frame 17 of the furnace, as for example, b means ofthe angle irons 18. Fuel is supplled to the retorts and tuyeres from a hopper 20, by means of rams 21; reciprocated by suitable mechanism 5G through the opemngs 22 Into the furnace; It is to be understood that the apparatus struction and per se forms no width equal to the width of the air box 10 p and an upper table portion 29 in width equal to the dlstance between the center lines of the retorts. The edestal portions 28 may, 1f desired, be ma e hollow to give greater strength for the weight of metal employed 1n sections 27. When the sections 27 are assembled one on the forward end 25 of each air box, they present a. substantiall flat supporting surface for a refractory wa l 30 of the character commonly employed in furnaces, and the spaced pedestals 28 constitute boundln walls of the fuel opening 22. The pedesta portions are notched at each side at 31, into which notches` lates 32 are adapted to be inserted. A guide late 33 of broad U-Shape extends the widt of the furnace and pro'ects downwardly and outwardly into the opper 20. The sections 27 are securedto the guide plate 33 by means of bolts 34 and the outer projecting edges 35 of the pilates 33 may be Secured tothe rear wall tes 36 of the hopper 20 by means of bolts 3 Air-distributin boxes 40 are disposed beneath the inwa l extending ledge of the table `portion 29 o the sections 27 and may be secured thereto by means of bolts 41. Each air-distributing box has an inwardlyprotruding base portion 43 which rests upon and serves to lock in place by means of a bolt' 44 the u per tuyred of a series of tuyres. The ase of the air-distributing box has a contour similar to that of the tuyre upon which it rests and is open to recelve air from the air box 10 through opening 46 in the tuyre 12 u on which 1t rests. The upper portion 47 of t e air-distributing boxproh-udestoeithersidenotunlihe plates 33, the p the letter T and provided with a plurality fail-I aperturesf- 'I'he guidesl 33, the wall sections 27 wi the plates 32 carried thereby and the boxes 40 are so shaped that the upper portions of the fuel o 22llareorexpandfromthehopper to the interior of the furnace. is clearly indicated in 1', 2 and 3. The guide Y tes 32 carried by the Seotions 27 and the protruding ends 47 of air-Y d1" "tinh 4 mf "dy' exten' upperw o eopen- 22. L, Similarly, the side walls of the sestals28ofthesections27andthebase portions 43 of theair-distribu boxes 40 constitute laterally diverw Y of the f mergeatthe o n 22 which cepitermie of the tu l The manner in w 'ch the above described structure is emplo ed. is readily understood. In brief, the usn stoker parts, having been' assembled, the several sections 27 of the well construction member 26-are set permanently inplaee sndthewall erectedthereon. Theplates32areinserted intothenotehes 31 and the air-distributing boxes secured, in place by bolts 41 and 44, it being understood that tuyres 12 are in place. The guide late 33isnowsecuredtoeachseetion27othe wall-sustaining member. When it is deaired to replace any of the boxes 40, it is only es ly, the plates 32 may be renewed from time totime.

' This arran sa: air boxesfand retol'ts b a senese w w '-1: carried frewall members, eacb Ihavediowninyin one form, it will be obvious to intheartthatit so ting air boxes and retorts Y a permanent wsll-sustammg ent permits the renewal of' ch are subject to high erosive wear under the continu- Leimen :-:y tible of various other f1: yf and atio` without departing from the spirit therelbsf, and I therefore, that only such limitations shall be placed thereupon as are imposed by the prior art'or as are specifically set forth in the appended What I claim is:

1. In an underfeed Stoker, a plurality of air boxes and retorts therebetween, wall-sustaining mein each eomprisin a pedestal portion anda ta le rton protruding'forwerdly and rearwardi; from the upper end of the estal portion, the pedestal portiom of e walLsustaining members standing upon the forward ends of the air boxes, and a furnace wall supported upon said wall-sustaining members.

2. Inanunderfeed stoker a. pluralit of inclined air boxes, retorts disposed tgerebetween, the forward ends of the air boxes having 'upwardly-presented horizontal supportfjloes, wall-sustaining members, each comprising a pedestal portion and a table portion ding frontwardly and rearwardly in the up end of the desta] portigni, the ped portions of e -walL sustaining members standing upon the horisontal supporting surfaces at the forward ends of the air bo and a furnaee wall supported upon said wa -sustaining members.

3. In an underfeed stoker, a' plurality of di therebetween,

structure sup- Egrted the forward ends of the air xes s providing fuel-admitting openings into said retorts, a furnace wall supported u said virali-su structure, andan air conducting andA distri uting structure detaehabl seeured to the wall-sustaining struchire, w and distributm'g the funisee w 4. In an underfeed stoker, a air'boxesjand retorts disposed therebetween, a permanent wall-sustaining structure siip- Ertedtson .forward endsof the air ings into said retorts, a furnace wall supported upon wall-sustaining structure, and an air-distnbutm box oommunicatn with each air bgx an detachably secure -to the 'wall structure, entirely beneathV the top thereof. y

Stoker, a plurality of 5. In an underfeed disposed therebetween, each siibox, eoin rising a t'iutioli and a table portlion protruring thempteleliier :2id of tile estal po po ions o members stan ward ofthemaihumm a rniiee wall sa yn iv sustain mem- .ae'nmif-diabueng im; isposed air-conducti u n the forstrueture may-lreplaeed without` plurality Y of e wallino lng fuel-admitting opeiisubstantially equal upon the uppermost tuyre of each series of tuyres, said air-distributing boxes being detachably secured to the wall-sustaining members.

6. In an underfeed stoker, a plurality of air boxes and retorts disposed therebetween, a series of tuyres carried by each air box, wall-sustaining members, each comprising a pedestal portion and a table portion protruding from the upper end of the pedestal portion, the pedestal portions of the wallsustainin members standing upon the forward en s of the air boxes, a furnace wall supported upon said wall-sustaining members, and an air-distributing box disposed upon the uppermost tuyre of each series of tuyres, said air-distributing boxes communicating with the air boxes through the said uppermost tuyere and detachably secured to the wall-sustaining members.

7. The combination with a stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of a member suported upon the forward end of each air ox, said member comprising a pedestal portion and -an extended wall-supporting portion extending frontwardly and rearwar y of the pedestal portion, and a furnace wa l support-ed upon said extending portions.

8. The combination with a Stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of a member suported upon 'the forward end of each air ox, said member comprising a hollow pedestal portion and an extended wall-su porting ortion extending frontwardly an rearwar ly of the pedestal portion, and a furnace wall supported upon said extending portions.

9. The combination with a Stoker having a plurality of tuyre ,air boxes spaced to form retorts therebetween, of a T-sha ed member supported upon the forward en of each air box, said member comprising a lower pedestal portion/ in width substantially equal to the width of an air box and an u per wall-supporting portion in length to the distance from the center line of one retort to the center line of an adjacent retort and in len h substantially equal to the thickness of t e wall, and a furnace wall supported upon said upper portion of said members.

10. The combination with a stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of wall-sustainin structure comprising sections having pe estal portions resting u on the forward ends of the air boxes an table ortions protruding forwardly and rearwardly from the pedestal portion, and plates carried by the pedestal portions of adjacent sections and overlying the retorts.

l1. The combination with a Stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of sectional wallsupporting and auxiliary air box structures, said wall-supporting structure comprising a plurality of table-like sections, each section having a pedestal portion supported upon the forward end of an air box, and a table portion protruding from the u per end of said pedestal portion, said auxi iary air box structure comprising a plurality of hollow castings, each castin being removably secured to one of sai table-like sections along the entire length of said tablelike section.

12. The combination with a stoker having a plurality of tu `ere air boxes spaced to form retorts there tween, of sectional wallsup orting and auxiliary air box structures, sai wall-supporting structure com rising a lurality of table-like sections, eac section aving a pedestal portion supported upon the forward end of an air box, and a table portion rotruding from the upper end of said pe estal portion, and said auxiliary air box structure comprising a plurality of hollow T-'shaped castings, each casting being removably secured to one of said tablelike sections.

In testimony whereof, I have hereunto subscribed my name this 28th day of December, 1922.

ROBERT A. FORESMAN.

upon the uppermost tuyre of each series of tuyeres, said air-distributing boxes being detachably secured to the wall-sustaining members.

6. In an underfeed stoker, a plurality of air boxes and retorts disposed therebetween, a series of tuyres carried by each air box, wall-sustaining members, each comprising a pedestal portion and a table portion protruding from the upper end of the pedestal portion, the pedestal portions of the wall sustainin members standing upon the forward en s of the air boxes, a furnace wall supported upon said wall-sustaining members, and an air-distributing box disposed upon the uppermost tuyre of each series of tuyres, said air-distributing boxes communieating with the air boxes through the said uppermost tuyre and detachably secured to the wall-sustaining members.

7. The combination with a Stoker having a plurality of tuyre air boxes spaced to form retorts therebetween of a member supported upon the forward end of each air box, said member comprising a pedestal portion and an extended wall-supporting portion extending frontwardly and rearwardl of the pedestal portion, and a furnace wa l supported upon said extending portions.

8. The combination with a Stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of a member supported upon 'the forward end of each air ox, said member comprising a hollow pedestal portion and an extended wall-su porting ortion extending frontwardly and) rearwar ly of the pedestal portion, and a furnace wall supported upon said extending portions.

9. The combination with a Stoker having a plurality of tuyreair boxes spaced to form retorts therebetween, of a T-sha ed member supported upon the forward en of each air box, said member comprising a lower pedestal portions in width substantially equal to the width of an air box and an upper wall-supporting portion in length e substantially equal to the distance from the center line of one retort to the center line of an adjacent retort and in leno'th substantially equal to the thickness of the wall, and a furnace wall supported upon said upper portion of saidmembers.

10. The combination with a stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of wall-sustainin structure comprising sections having pe estal portions resting u on the forward ends of the air boxes an table ortions protruding forwardly and rearwa ly from the pedestal portion, and plates carried by the pedestal portions of adjacent sections and overlying the retorts.

11. The combination with a stoker having a plurality of tuyre air boxes spaced to form retorts therebetween, of sectional wallsupporting and auxiliary air box structures, said wall-supporting structure comprising a plurality of table-like sections, each section havin ,a pedestal ortion supported upon the orward end oi) an air box, and a table portion protrudingI from the u per end of said pedestal portion, said auxi iary air box structure comprising a plurality of hollow castings, each castin being removably secured to one of sai table-like sections along the entire length of said tablelike section.

12. The combination with a stoker having a plurality of tu re air boxes spaced to form retorts therebetween, of sectional wallsupporting and auxiliary air box structures, said wall-supporting structure com rising a plurality of table-like sections, eac section aving a pedestal portion supported upon the forward end of an air box, and a table portion rotruding from the upper end of said pe estal portion, and said 'auxiliary air box structure com rising a plurality of hollow T-shaped castings, each casting being removably secured to one of said tablelike sections.

In testimony whereof, I have hereunto subscribed my name this 28th day of December, 1922.

ROBERT A. FORESMAN.

CERTIFICATE 0F CORRECTIGN..

Patent No. 1, 617. 479.

Granted February l5, 1927, toA

ROBERT A. FonEsMAN.

,It is hereby certified that error appears in the printen specification of the above numbered patent requiring correction as follows: Page 3. line 50. claim 9. for the word "length" read "wdth"; and that the said Letters-Patent should be reed with this correction therein that the same may conform to the record of the ene in the Patent Office.

Sifned and sealed this 26th day of April, A. D. 1927.

M. J. Moore. Acting Commissioner of Patente.

CERTlFlCATE 0F CORRECTIGN Patent No. 1,617,479. Granted February l5, 1927, to

ROBERT A. FORESMAN.

It is hereby certified that error appears in the printen specification of the shove numbered patent requiring correction as follows: Page 3. line S0. claim 9. for the word "length" read "width"; and that the said Lettcrslatent should be read with this correction therein that the same may conform to the record of the else in the Patent Office.

Sined and sealed this 26th day of April, A. D. l927.

M. J, Moore, Sell. Acting Commissioner of Patente. 

